- threeR's
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three R's
pl.n.
Reading, writing, and arithmetic, considered as the fundamentals of elementary education.[From the phrase reading, 'riting, and 'rithmetic, alteration of reading, writing, and arithmetic.]
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Universalium. 2010.
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Universalium. 2010.
Litre — One litre is equivalent to this cube Each side is 10 cm 1 litre water = 1 kilogram water (at 4 °C) The litre (or liter see spelling differences) is a unit of volume equal to 1 cubic decimetre (dm3), to 1,000 cubic centimetres… … Wikipedia